Nov 082023

Most of us will have at some point have bought a long power cable to charge the bike on the deck, but [Slava G. Turyshev] has a slightly more ambitious idea. In this recent paper, he outlines how an advanced civilization could use a star or two to transmit power or send signals over an interstellar distance. And his idea is also simple enough that we could do it right now, with existing technology, or detect if someone else is doing it.

Gravitational lensing is where a large mass (such as, say, a star) bends the path of light around it. That can act like a lens in a telescope, focussing light that would otherwise be impossible…

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